[jira] [Created] (JENA-784) NodeUtils.compareRDFTerms() does not handle variable nodes

[Rob Vesse (JIRA)]

Rob Vesse created JENA-784:
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             Summary: NodeUtils.compareRDFTerms() does not handle variable nodes
                 Key: JENA-784
                 URL: https://issues.apache.org/jira/browse/JENA-784
             Project: Apache Jena
          Issue Type: Bug
          Components: ARQ
    Affects Versions: Jena 2.12.0
            Reporter: Rob Vesse
            Assignee: Rob Vesse
             Fix For: Jena 2.12.1


{{NodeUtils.compareRDFTerms()}} does not cope with variable nodes e.g.

{noformat}
Node x = NodeFactory.createVariable("x");
Node y = NodeFactory.createVariable("y");

// This produces an ARQ internal error
int compare = NodeUtils.compareRDFTerms(x, y);
{noformat}

I would propose that we add support for comparing variable nodes making them 
less than blank nodes in the overall ordering



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